Interface engineering Z-scheme Ti-Fe2O3/In2O3 photoanode for highly efficient photoelectrochemical water splitting

Yinyin Li, Qiannan Wu, Yifan Chen, Rui Zhang, Cuiyan Li, Kai Zhang, Mingjie Li, Yanhong Lin, Dejun Wang, Xiaoxin Zou, Tengfeng Xie

Research output: Journal article publicationJournal articleAcademic researchpeer-review

44 Citations (Scopus)

Abstract

Exploiting interface-engineer of In2O3-based photoanode to achieve a higher charge separation efficiency could be regarded as a pivotal but challenging research in water splitting. Herein, the state-of-the-art Ti-Fe2O3/In2O3 photoanodes with different Ti4+ doping concentrations are fabricated for exploring the interface-engineering effect on PEC performance. The optimized 150Ti-Fe2O3/In2O3 photoelectrode with the rapid interfacial hole trapped (∼ 8.96 ps) and long-lived charge separation states could achieve excellent PEC performance by femtosecond time-resolved absorption spectroscopy (fs-TAS). As expected, it shows the highest photocurrent density of 2 mA/cm2 at 1.23 V vs. RHE, which is nearly 7 times higher compared with pure In2O3. Moreover, the Z-scheme mechanism could be fully confirmed by femtosecond time-resolved absorption spectroscopy (fs-TAS) and in-situ double-beam detection strategy (AM 1.5 + 405 nm). This work provides an effective and feasible strategy on designing and regulating high-efficiency composite photoanode with Z-scheme transfer mechanism.

Original languageEnglish
Article number120058
JournalApplied Catalysis B: Environmental
Volume290
DOIs
Publication statusPublished - 5 Aug 2021

Keywords

  • Interfical electric field
  • Ti-FeO/InOphotoanode
  • Transient absorption spectroscopy
  • Water splitting
  • Z-scheme mechanism

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

Fingerprint

Dive into the research topics of 'Interface engineering Z-scheme Ti-Fe2O3/In2O3 photoanode for highly efficient photoelectrochemical water splitting'. Together they form a unique fingerprint.

Cite this